Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

Cariology > Histopathology > Flashcards

Histopathology Flashcards

1
Q

What are the specific lengths of the rods and where they are pointing towards?

A

8 micrometers towards the surface

4 micrometers towards the DEJ

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

As we grow old, the enamel becomes more permeable. T or F

A

false

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

These defects start from the outer portion of the enamel and up to the DEJ

A

Enamel lamellae

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

Describe Enamel Tufts

A

Defects found along the DEJ

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

Interrod substance is made up of?

A

Calcium hydroxyapatite and 0.5% organic substances

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

What is the function of the interrod substance?

A

Keeps the rods together

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

Dentin has the same mineralization as?

A

Bone

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

Dentinal fluid flows ________ the enamel surface

A

Towards

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

What are the surfaces in enamel?

A

Surface zone
body of the lesion
dark zone
translucent zone

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

Why is the surface zone a relatively unaffected area?

A

Due to the constant remineralization

It has a greater resistance due to greater degree of mineralization and greater degree of fluoride concentration.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

The surface zone contains ______ calcium phosphate

A

Bulky, poorly defined

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

What does reprecipitation mean?

A

There is a small degree of remineralization but it is not enough unless there is an intervention

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

Body of the lesion is the area of greatest demineralization. How many percent?

A

20-50%

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

This is also known as the positive zone

A

dark zone

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

The dark zone is _________ % of demineralization

A

5%

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

Translucent zone is always present. T or F

A

False

17
Q

How many percent of demineralization is Translucent zone?

A

1%

18
Q

What are the layers in dentinal caries?

A

Bacterial biofilm zone
Zone 3
Zone 2
Zone 1

19
Q

What is within the bacterial biofilm zone?

A

Conglomeration of bacteria

20
Q

Other names of Zone 3 ?

A

Soft dentin
Infected dentin
Outer carious dentin

21
Q

What occurs in Zone 3?

A

Low mineral content
Irreversible denatured content

Becomes necrotic and contaminated

22
Q

What are the other names of Zone 2?

A

Firm dentin
Affected dentin
Inner carious dentin

23
Q

What occurs in Zone 2?

A

Demineralization of Intertubular dentin

Initial formation of Intratubular fine crystals

24
Q

Other names of Zone 1?

A

Hard dentin
Sclerotic dentin
Tertiary dentin
Reparative dentin

25
Q

What are the differences between primary, secondary and tertiary dentin?

A

Primary - dentin produced during the development of the tooth
Secondary - Dentin produced after the tooth has fully developed
Tertiary - Dentin produced due to a noxious stimuli

26
Q

What are found within the dentinal tubules in sclerotic dentin?

A

Hydroxyapatite crystals and Whitlocklite crystals

27
Q

What initiates the sclerotic dentin?

A

When the pulp gets irritated

28
Q

What is sclerosis?

A

Increase in inorganic material in that area

29
Q

Until what layer can we excavate the dentinal caries?

A

Soft dentin or Outer carious dentin or Infected dentin or Zone 3

30
Q

What are the advance changes in dentin? (3)

A

Decalcification of walls
Liquefaction foci
Ovoid areas filled with necrotic debris

31
Q

This is the breakdown of dentinal tubules

A

Liquefaction foci

32
Q

What is formed during liquefaction foci?

A

Liquefactive foci.

33
Q

What are dead tracts?

A

Dead tracts are formed when the progression of caries is too fast that the dentin will not be able to launch it’s protective mechanism through hydroxyapatite and whitlocklite crystals

34
Q

Reparative dentin is formed during __________ stimuli and are formed by _________ odontoblasts

A

Stronger stimuli and New

35
Q

Reactionary dentin is formed by ________ odontoblasts in response to ________ stimuli

A

Surviving and mild

36
Q

Is tertiary dentin and sclerotic dentin the same?

A

No. Sclerotic dentin is when the dentinal tubules get filled with hydroxyapatite and whitlocklite crystals while Tertiary dentin is when hydroxyapatite and whitlocklte crystals are deposited at the base.

37
Q

This is our body’s defense mechanism

A

Inflammation

Cariology (5 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions